Application of polypropylene fiber-containing cemented filling material to filling mining

A technology of cementing filling materials and polypropylene fibers, which is applied in filling materials, mining equipment, earthwork drilling and mining, etc., can solve the problems of low utilization rate of fine-grained tailings, high cement unit consumption, poor crack resistance, etc., and achieves a wide range of Applicable significance and promotion value, the effect of reducing unit consumption and improving utilization rate

Inactive Publication Date: 2017-12-22
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problems of low compressive strength, poor crack resistance, high cement unit consumption and low utilization rate of fine tailings in the mine filling of fine tailings. The present invention provides a Application of a cemented filling material containing polypropylene fiber in filling mining

Method used

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  • Application of polypropylene fiber-containing cemented filling material to filling mining
  • Application of polypropylene fiber-containing cemented filling material to filling mining
  • Application of polypropylene fiber-containing cemented filling material to filling mining

Examples

Experimental program
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Effect test

Embodiment 1

[0078] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0079] 2 parts of polypropylene fiber, 249 parts of cement, 995 parts of fine tailings, and 763 parts of water.

[0080] Polypropylene fiber length 9mm.

[0081] This embodiment was tested for compressive and tensile properties, and the results are shown in Table 2.

[0082] Table 2 embodiment 1 performance measurement result

[0083]

[0084] Comparing the experimental results of Example 1 and Comparative Example 1, it can be seen that adding the polypropylene fiber helps to improve the compressive strength and tensile strength.

Embodiment 2

[0105] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0106] 2 parts of polypropylene fiber, 205 parts of cement, 1024 parts of fine tailings, and 753 parts of water.

[0107] Polypropylene fiber length 9mm.

[0108] The embodiment was tested for compressive and tensile properties, and the results are shown in Table 4.

[0109] Table 4 embodiment 2 performance measurement result

[0110]

[0111] Comparing Example 2 and Comparative Example 2, it can be seen that adding the polypropylene fiber helps to improve the compressive strength and tensile strength. In addition, comparison between Comparative Example 1 and Comparative Example 2 found that reducing the amount of cement, the strength decreased significantly, but through Comparative Example 1 and Example 2, it was found that under the premise of reducing the amount of cement, the addition of the polypropylene fiber , its various strengths can be clos...

Embodiment 3

[0113] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0114] 1 part of polypropylene fiber, 205 parts of cement, 1024 parts of fine tailings, and 753 parts of water.

[0115] Polypropylene fiber length 9mm.

[0116] This embodiment was tested for compressive and tensile properties, and the results are shown in Table 5.

[0117] Table 5 embodiment 3 performance measurement result

[0118]

[0119]

[0120] Comparing Example 2 and Example 3, it can be seen that in the case of reducing the amount of fiber added, the compressive strength and tensile strength of the filling body are both reduced, and the mechanical properties of the filling body are deteriorated.

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Abstract

The invention discloses application of a polypropylene fiber-containing cemented filling material to filling mining, belonging to the technical field of filling materials for mines. The invention also provides the filling material, comprising polypropylene fiber, cement and mine tailings. The invention also provides filling slurry. The filling slurry comprises 1-3 parts of polypropylene fiber, 200-260 parts of cement, 975-1074 parts of fine tailings and 664-813 parts of water, wherein the fiber has a length of 6-12 cm, and the mass concentration of the filling slurry is 60-64% after mixing and stirring. According to the invention, doping of polypropylene fiber into the polypropylene fiber-containing cemented filling material can effectively overcome the problems of low strength and proneness to cracking of a fine-tailing filling body after curing and improve the compressive performance and fracture resistance of the filling body. With the fiber-containing filling material, the compressive strength and tensile strength of the filling body can meet the requirements of mining on the strength of the filling body, unit consumption of filling cement per cubic meter is reduced, and the utilization rate of the fine tailings is improved, so the polypropylene fiber-containing cemented filling material is an innovative filling material for mines and has a wide application range and good promotion value.

Description

technical field [0001] The invention relates to the technical field of mine filling materials, in particular to the application of a cemented filling material containing polypropylene fibers in filling mining. Background technique [0002] With the depletion of mineral resources and the continuous safety and environmental problems caused by the development and utilization of resources, the filling mining method has gradually become the mainstream trend of mining development. After the stope is filled, the surrounding rock support of the filling body and the control of ground pressure will put forward higher requirements for the research and innovation of filling materials. [0003] At present, most mine fillings mainly use graded tailings as filling aggregate. The fine-grained tailings (-74μm) contained in the overflow water after classification need to be transported to the tailings storage. Enterprises will have to face the construction of tailings storage and the High ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E21F15/00
CPCC04B28/00C04B2111/00017C04B2201/50E21F15/005C04B18/12C04B16/0633
Inventor 史秀志陈新方振鹏陈辉黄沛生周健杜向红苟永刚钟杰晁忠巍谢胜王明政王猛
Owner CENT SOUTH UNIV
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